Rivet guide



Aug. 5, 1924 E. B. STIM PSON RIVET Filed June. '2, 2

Patented Aug. 5, 1924.

siren STATES PATENT EDWIN B. STIIVIPSO'N, OF BROOKLYN, NEW YORK, ASSIGNOR TO EDWIN B. STIMPSON 7 COMPANY, 05 BROOKLYN, NEW YORK.

RIVET GUIDE.

To all whom 617mg concerns Be it known that I, EDWIN B. S'rrr'irsoN, a citizen of the United-States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Rivet Guides, of which the following is a specification.

The present invention relates to riveting machines andfparticularly to the rivet guiding and positioning mechanism.

The general, objects of the invention are to provide simple and practical means for guiding and accurately positioning the rivets andforholding the rivets under control during the driving stroke thereof so as toprevent what is known as tumbling. 7 Other objects of the invention and the novel features of construction, combinations and relations of parts which make possible the attainment of such objects will appear in the courseof the following specification which is to be read in conjunction with the drawing accompanying and forming part of the In the drawing referred to,- Figure 1 'i'sa broken front elevation and part sectional view of --rivet guiding and feeding mechanism forming one embodiment of the invention.

Figure 2 is a side view of the same mechanism shown partly in section on substantially the plane of line 2-2 of Figure 1.

Figure 3 is an enlarged plan view of the rivet guides as taken on substantially the' plane of line 33 of Figure 1.

The. numeral 1 designates a portion of the head of a riveting machine, in which operates the driving plunger 2.

The rivets shown at 3 are fed by gravity down an inclined chute 4 against an abut- -ment 5 from which they are released one at a time by the feed. slide 6.

The rivet guiding and controlling mem bers are located at the bottom of the feed chute, beneath the plunger and consist in the present disclosure of a pair of cooperating guide members 7, 8 carried at the lower ends of spring arms 9, 10. These spring supports are shown as seated in recesses 23 in the opposite sides of a. portion of the'head and as held therein by a bolt 11 which, for purposes of ready removability, is shown equipped with a thumb screw 12.

1922. Serial no. 566,626.

This construction enables the guides to yield during the passage of the rivet and to firmly hold the rivet during such passage.

The guides may he initially adjusted with respect toeach other by means of set screws 13, 14, tapped into the guides and abutting at their inner ends, as shown in Figure? At the side facing the foot of the inclined chute the guides are cut away, as indicated at 15, 16, to provide a flaring opening for the reception of the shanks of the rivets and at their upper ends the guides are recessed to formv an annular chamber 17 of a size to receive the heads of the rivets. Immediately below this'head-receiving chamber the rivet passage is reduced in diameter, as indicated at 18, and this passage terminates atthe lower end in a tapered conical. throat 19, which at its smallest portion is substantially equal in diameter to the shank of the rivet. Adjoining this throat portion the guides are provided with inwardly and downwardly inclined shelves, 20, 21., forming supports for the rivet head at theextreme lower end of the guides. The lower end of the plunger is shown as cupped at 22 toqclosely engage the head of the rivet.

Operation.

the rivet down through the reduced passage 1 18 and the shank through the contracted throat at the lower end of such passage. In this movement it will be seen that both the head and the shank of the rivet are positively guided and held under control. As the point of the rivet engages and passes into the article to which the rivet is being applied, the head of the rivet comes into engagement with the convergent guide shoulders 20, 21, which further insure a straight line movement of the rivet and prevent it from turning over as it leaves the guides.

From the foregoing it will be seen'that with this invention the rivets are properly guided and held under control during the driving of the same, and that tumbling is positively prevented.

What I claim is:

1. In a machine of the character described, cooperating rivet guide members having opposed surfaces, yieldingly held towards each other and providing a rivet-passage between them, the opposed surfaces of the guides being shaped to form a rivet-headreceiving seat at one end of the passage and rivet-shank-guiding means at the other end of the passage, and an outwardly flaring shank-guide communicating with the side of the passage from the exterior thereof.

2. The structure of claim 1, in which the rivet-shank-guiding means first referred to includes a contracted throat.

3. The structure of claim 1, in which there are inclined rivet-head-guiding shoulders at thesecond-named end of the passage.

4. The structure of claim 1, in which the rivet-shank-guiding means first referred to includes a contracted throat, and in which there are rivet-head-guiding shoulders adjacent the contracted throat.

5. The structure of claim 1, in which the rivetguidemembers are supported respectively by spring arms, and provided with means for adjusting their relation to each other. 1

6. In a machine of the character disclosed, substantiallyparallel spring arms and cooperating rivet guides carried thereby and formed with a rivet passage therethrough constructed with a head-receiving seat at the inlet end thereof and with a contracted steam guiding throat at the outlet end thereof, and with an outwardly flaring shank guide communicating with the side of the passage from the exterior thereof.

7. The structure of claim 6 with inclined head guiding shoulders at the exit end of the guides adj aoent the contracted throat.

8. .The structure of claim 6 with readily releasable means for securing the spring arms and adjustable means for varying the relation of the spring arms.

9. The structure of claim 6 with set screws accessible at'opposite sides of'the guides for varying the relation of the same.

10. A device of the kind described, comprising substantially parallel spring arms, cooperating members of a rivet guidejcarried on the ends of the. arms, respectively, and V in opposed relation, and adjusting means for regulating the approach-of rivet.

guide members towards each other.

11. A device of the kind described, comprising substantially parallel spring arms, cooperating membersof a rivet guide carried on the ends of the arms, respectively, and in'opposed' relation, andPadjujsting means for regulating the approach of rivet guide members towards each other, saidadjusting means comprising a screw passing through each .rivet guide member, with its head accessible from the exterior of the member and with itsother end in contact with the corresponding end of the. companion screw.

In testlmony whereof'l affixmy signature. EDWIN STlMPSON. 

